Table 2.

Effect of serum from mice bearing large MC-C tumor on in vitro proliferation of immune spleen cells activated with tumor lysates

3[H] thymydine uptake by spleen cells (c.p.m. ± s.e.)a
Final serum dilution	MC-C 2,000 mm3	Normal	MC-C 2,000 mm3 + DX-3	MC-C 2,000 mm3 + DX-7	Medium only
–	–	–	–	–	22,117 ± 981
1:2	3,757 + 749a	8,507 ± 730	10,389 ± 213	3,107 ± 217e
1:4	6,072 ± 691b	13,688 ± 1,267	14,543 ± 1,324	4,567 ± 234f
1:8	9,707 ± 1014c	15,048 ± 1,219	14,340 ± 677	11,245 ± 1,005g
1:16	10,184 ± 784d	15,367 ± 533	15,485 ± 1,248	13,034 ± 1,369
GIU50/ml	>160	28.1	22.9	78.5

^aEach value is the mean of triplicate to sextuplicate measurements except for medium only (n = 12) and for dilution 1:2 of MC-C 2,000 mm³ and MC-C 2,000 mm³ + DX-3 (n = 2)

^a P < 0.05 versus normal (same dilution) and P < 0.02 versus MC-C 2,000 mm³ + DX-3 (same dilution)

^b P < 0.001 versus normal and MC-C 2,000 mm³ + DX-3

^c P < 0.05 versus normal and P < 0.01 versus MC-C 2,000 mm³ + DX-3

^d P < 0.001 versus normal and P < 0.05 versus MC-C 2,000 mm³ + DX-3

^e P < 0.001 versus normal and MC-C 2,000 mm³ + DX-3

^f P < 0.01 versus normal and MC-C 2,000 mm³ + DX-3

^g P < 0.05 versus MC-C 2,000 mm³ + DX-3